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General Information => Troubleshooting => Topic started by: LOBOTAC on July 13, 2013, 07:36:07 pm

Title: Dropped valve? Now what?
Post by: LOBOTAC on July 13, 2013, 07:36:07 pm
Story goes....packed up the Jetta and headed out for a 200 mile drive to eastern washington for a weekend of fun in the sun.  All maintenance done.  Recent oil change, oil level good, coolant level topped off, recent air filter change.  Filled up the tank with a tank of fresh diesel, a bit of wax and some atf.  Made it across the pass with out a hiccup, across to the mighty columbia, crossed and headed up the long slow grade to the top of the other side.  Few miles up the hill, felt a shudder, pushed in the clutch, oil light on, coasted off of the interstate to a station at the lovely town of George.  Engine locked up.  Had a friend come with a trailer and towed it home.  Thought all along probably seized the pistons in the cylinder. Timing belt intact.   Once got it home put a socket on the crankshaft and turned it over freely almost a full turn until...clunk....definitely in the top end. 
Question....what do you guys think happened?  Where do I start?  I'm thinking pull the head???  Need some of your knowledge to help me get started on getting her back up and clickin and clackin down the road for another few hundred thousand. :-)
Title: Re: Dropped valve? Now what?
Post by: burn_your_money on July 13, 2013, 08:08:13 pm
I'd pull the valve cover and see if the head looks messed up from the top. If it does it's going to be expensive. If the head looks fine I'd rotate it and see that all the lifters are moving properly.
Title: Re: Dropped valve? Now what?
Post by: TylerDurden on July 13, 2013, 08:34:11 pm
I'd just pull the head.  The problem should be immediately visible. If not, I'd carefully turn the crank to see if it is obstructed.
Title: Re: Dropped valve? Now what?
Post by: libbydiesel on July 13, 2013, 09:28:04 pm
Probably a valve or pre-cup.  You're looking at a head, piston, rod and maybe a block... 
Title: Re: Dropped valve? Now what?
Post by: 8v-of-fury on July 13, 2013, 10:13:47 pm
Time to drive on up to Canada and get yourself a 1.9L engine ;).
Title: Re: Dropped valve? Now what?
Post by: LOBOTAC on July 14, 2013, 01:43:53 pm
Thanks for the responses.  Going to tear in to it this afternoon.  Ill take pics and post them up later to keep all updated on what I find.
Title: Re: Dropped valve? Now what?
Post by: CRSMP5 on July 14, 2013, 06:37:06 pm
the one that dropped a valve on me after putting a free unknown diesel in 8k prior ruined the head, piston/rod... i had it fixed for under 300 in parts.. day of work.. block never left car...

the one bbob purchased poked hole thru bore so 100% junk..
Title: Re: Dropped valve? Now what?
Post by: LOBOTAC on July 14, 2013, 08:15:19 pm
well, i am no longer a head virgin  :).  Got the head removed and to my surprise found no damage to the head or pistons.  Rotated cam and all valves open and close as they should.  rotate crank and 3 of the pistons move up and down just as they should.  the other one......not moving....guess I pull the pan next? 
Title: Re: Dropped valve? Now what?
Post by: theman53 on July 14, 2013, 08:20:37 pm
Got lucky..ish. When my #3 piston didn't move then I wrecked everything that touched the block. You at least have a good head.
Title: Re: Dropped valve? Now what?
Post by: LOBOTAC on July 14, 2013, 08:37:13 pm
So, am i right then to drop the pan?  Are you saying block is bad? 
Title: Re: Dropped valve? Now what?
Post by: CRSMP5 on July 14, 2013, 08:38:51 pm
yea something broke.. pull pan,.. hope bad rod.. but assume bottom end..
Title: Re: Dropped valve? Now what?
Post by: theman53 on July 15, 2013, 05:35:23 am
yes you have to see what is going on.
Title: Re: Dropped valve? Now what?
Post by: LOBOTAC on July 15, 2013, 12:59:27 pm
got the pan off and found some peices as expected.  took some pics to share but having trouble getting them to post. any advice on getting the pics up here?
Title: Re: Dropped valve? Now what?
Post by: TylerDurden on July 15, 2013, 02:00:27 pm
I upload to Picasaweb (Google). Others use flikr, etc.

Then hotlink like so:

Code: [Select]
[img]https://lh6.googleusercontent.com/-htnflsyT7zs/UUp8ugsNNsI/AAAAAAAABFc/vbDJQxNwO_A/s800/hydraulicKSB1.jpg[/img](putting the image URL between the IMG tags, or using the Insert Image button)
Title: Re: Dropped valve? Now what?
Post by: LOBOTAC on July 15, 2013, 02:32:13 pm

Thanks for the help on getting the pics up. 
Here is what I found: 

Most of the pieces...
(http://imageshack.us/a/img802/4440/htcp.jpg)

(http://imageshack.us/a/img822/7858/z6j8.jpg)

(http://imageshack.us/a/img194/3782/iz4b.jpg)
ouch...
(http://imageshack.us/a/img593/4738/reev.jpg)

(http://imageshack.us/a/img811/3757/7zq6.jpg)

(http://imageshack.us/a/img819/1002/4qqk.jpg)
You can see the piece missing at the bottom of cylinder...
(http://imageshack.us/a/img24/2770/ch2d.jpg)

(http://imageshack.us/a/img96/8792/k9mk.jpg)
Dont think elmers glues going to hold this back in place...
(http://imageshack.us/a/img826/262/2kfd.jpg)

I have read that others have run blocks with chunks similar missing...Anxious to hear what you all think...I really would like to get this thing back on the road....im just cringing at the thought of filling up 2-3 times a week in my truck...Im cheap, thats why I drive or i guess did drive a vw diesel...help me get her back on the road with a minimum of costs and time.
Title: Re: Dropped valve? Now what?
Post by: CRSMP5 on July 15, 2013, 06:51:02 pm
how is the crank?? but ive used a block with bigger chunk missing down there with no problem.. my 1st take 4 and build 1 he block lost #3 as vw rebuild engines do.. but no hole inn block.. and i miss that engine.. should have never went 2.slow from it..
Title: Re: Dropped valve? Now what?
Post by: LOBOTAC on July 15, 2013, 07:04:21 pm
crank looks to be fine.  Just from what I can see with it in the block still.  What should I be looking for? 
Title: Re: Dropped valve? Now what?
Post by: CRSMP5 on July 15, 2013, 08:13:28 pm
where the rod beat it up.. like that.. id worry bout things like edges, nicks and things.. look close at im shaft and such.. it locked.. so it hit something..
Title: Re: Dropped valve? Now what?
Post by: LOBOTAC on July 15, 2013, 09:01:30 pm
Ill look at it closer tomorrow in the light.  Assuming the crank looks good, what parts do I need to be looking for?  I am thinking a set of Pistons/conn rods, bearings, gaskets.  What else should I do while its all apart?
Title: Re: Dropped valve? Now what?
Post by: CRSMP5 on July 15, 2013, 10:51:27 pm
if piston undamaged id throw rod, bearings, rings in it...

or 1 used piston if needed too.. but it locked up.. so you gotta really look good at things lik eim shaft which requires removing the block to get it out.. if mk1.. remove rear engine mount in mk2 will get it out.. but if the main cap area of block go tsmacked.. id worry it may poke a hole down the road like aaz seem too..
Title: Re: Dropped valve? Now what?
Post by: libbydiesel on July 16, 2013, 07:53:07 am
Did you put that one rod bolt back in the cap?  If not, then they were installed backwards... 

There's no way I'd run that block without getting it magnafluxed and if going to that trouble, I'd just replace it.  There's cheap and then there's so cheap that it gets really expensive.
Title: Re: Dropped valve? Now what?
Post by: LOBOTAC on July 16, 2013, 08:52:39 am
I did slide that one back in.  Pretty sure that this engine has never been apart before now.  Bought car from 2nd owner 150k ago.
Title: Re: Dropped valve? Now what?
Post by: CRSMP5 on July 16, 2013, 10:12:26 am
(http://imageshack.us/a/img819/1002/4qqk.jpg)
that makes crank junk too... the blue edge.. its ruined.. there has to be a matching blue spot on the crank..

went looking for libby question pic bout bolt..

if that was #3 and your vw mfg duel op lights did not work right.. lost oil pressure fast and spun #3 rod.. guy changes oil in car fri.. adds slick 50 to it.. sends his wife to store.. towed to me as 1 of 2 things happened.. fram oil filter junk, or slick 50 plugged it up.. had oil in the pan still.. but the rod blew the auto starter off the back of the block :D ahhh young memories guy was state piggy

if it was say low pressure for long time.. idiot light system killed/did not exist.. they tend to spin #1 and #2 mains.. too thin oil stuff like that
Title: Re: Dropped valve? Now what?
Post by: LOBOTAC on July 16, 2013, 10:28:18 am
I'll be looking closely at the crank and im shaft today when home from work.  I will try to get some good pictures of it to post up for you all. BTW this is #1.  Oil lights work normally.  Oil light came on as I pushed in the clutch and engine died.  No indications previously.  Only Mann oil and air filters for me.  Ran a fram once when 1st bought her and quickly discovered they were junk.  Replaced it with a Mann filter 250 miles later.  Also only run Rotella, changed, every 2500-3500 miles.   
Title: Re: Dropped valve? Now what?
Post by: CRSMP5 on July 16, 2013, 10:33:22 am
ive never see #1 rod fail... ever... i think the stud broke...

crank is trash... look 1/2 way up rod at how the blue edge grew the heat up the rod to the point the rod bent...

but #1.. may miss im shaft and block stout there vs the other 3... but the crank is scrap.. look at how rod was riding unstraight on the crank to blue edge it...
Title: Re: Dropped valve? Now what?
Post by: theman53 on July 16, 2013, 02:38:38 pm
I have blue on some of my rods that were fine and on the crank. Some of that could be the paint from the factory as that is what mine is. Being forged they are induction heat tempered and there is bluing from that too. I wouldn't assume it is junk, I would get it checked out.
Title: Re: Dropped valve? Now what?
Post by: LOBOTAC on July 16, 2013, 07:08:12 pm
Took a look and this is what I could see.
(http://imageshack.us/a/img22/1811/3pqu.jpg)
   
(http://imageshack.us/a/img22/6148/hrhg.jpg)
(http://imageshack.us/a/img542/2985/put1.jpg)

(http://imageshack.us/a/img32/7459/re56.jpg)
Not sure if the pics will show but there is a spot that is obviously where the rod smacked into the crank. 
(http://imageshack.us/a/img855/7855/ynps.jpg)
I am worried about the heat on the rod/crank.  As well as any unseen damage to the block where the rod smacked the cylinder. 
I'd hate to put her back together only to have a more catastrophic failure.
Leaning towards finding another block or motor and getting it in the car then later having this one magnafluxed and if good rebuild and have for later.

Your thoughts? 
Title: Re: Dropped valve? Now what?
Post by: LOBOTAC on July 16, 2013, 07:11:03 pm
Btw looks as though rod hitting the side of the cylinder stopped it short of hitting the im shaft.  Didnt take any pics of it but no marks on it at all. 
Title: Re: Dropped valve? Now what?
Post by: CRSMP5 on July 16, 2013, 07:24:53 pm
the crank is junk.. too blue in bad ways...

i think you need to seek out bottom end...
Title: Re: Dropped valve? Now what?
Post by: libbydiesel on July 16, 2013, 08:03:12 pm
This is not even a 1.6TD.  Save the intermediate shaft and the other three rods and recycle the rest or use it as a planter/boat anchor.
Title: Re: Dropped valve? Now what?
Post by: CRSMP5 on July 16, 2013, 08:29:48 pm
well pull piston from rod.. its still good right?

keep other 3 holes... sell them 1 by 1 to people who need single rod or keep for spairs..

oil pump... im shaft, vac and all keep... i do not know if id reuse the pump.. but it has parts...

coffee table w/plexy the block...

rod gets hung from rear tow eye on bumper as effigy to diesel soot gods of speed.. i used hose clamp on mine... took 3 years till it failed and lost my jewl :( but at least i was not following myself.. :D
Title: Re: Dropped valve? Now what?
Post by: theman53 on July 16, 2013, 08:40:33 pm
I am using my anchor block as a template for engine swaps :D